Mine-car brake-shoe.



No. 841,264. PATENTED JAN. 15, 1907. D.'S. MILLER & J. M. LANDPAIR. MINE OAR BRAKE SHOE.

APPLICATION FILED SEPT. 26, 1906.

W/m gss T0186 I If v A TTORNEYS WZZZZJ/FZZZW UNITED STAES PiIE C DANIEL S. MILLER AND JOHN M. LANDFAIR, OF BLACK LICK STATION,

PENNSYLVANIA.

MINE-CAR BRAKE-SHOE.

Specification of Letters Patent.

Application filed September 26,1906. Serial No- 336,376.

To all whom, it may concern:

Be it known that we, DANIEL S. MILLER and JOHN M. LANDFAIR, citizens of the United States, residin at Black Lick Station, in the county of ndiana and State of Pennsylvania, have invented a new and useful Mine-Car Brake-Shoe, of which the following is a specification.

This invention relates to car-brakes of that general class especially designed for use on mining-cars, and has for its object to provide a strong durable device of this character capable of exerting a maximum braking action on the car-wheels with a minimum expediture of power.

A further object of the invention is to provide a brake-shoe capable of being adjusted vertically of the car when the shoe becomes worn or otherwise impaired from constant use and means for locking the shoe in adjusted osition.

further object is to provide means for guiding the shoe when the latter is adjusted vertically and means for supporting the shoe in alinement with the car-wheels.

A still further object of the invention is to generally improve this class of devices, so as to increase their utility, durability, and efficiency.

With these and other objects in view the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, and illustrated in the accompanying drawings, it being understood that various changes in form, proportions, and minor details of construction may be resorted to within the scope of the appended claims.

In the accompanying drawings, forming a part of this specification, Figure 1 is a side elevation of a mining-car provided with a brake constructed in accordance with my invention. Fig. 2 is a front elevation of the same. Fig. 3 is a side elevation, partly in section, of the brake-shoe.

Similar numerals of reference indicate corresponding parts in all of the figures of the drawings.

The improved brake mechanism is principally designed for use on mining-cars and by way of illustration is shown applied to a mining-car of the ordinary construction, in

which 5 designates the body portion, and 6 the car-wheels.

Pivotally mounted on suitable hangers 7, secured to the side walls of the car,is a vertically-movable yoke 8, the closed end of which extends transversely across the adjacent end of said car and is provided with a centrally-disposed depending link or arm 9, as shown. Pivotally mounted on a stud or bolt 10, extending laterally from the end of the car, is a bell-crank lever 11, the short end 12 of which is pivotally connected with the link 9, while the long end thereof terminates in an operating-handle 13, there being a notch or recess 14 formed in the lever adja cent the handle 13 for engagement with the teeth on the segmental rack 15. The rack 15 is secured to one end of the car-body in spaced relation to the closed end of the yoke 8 and is provided with a terminal lug 16 for locking the'operating-lever 10 in released or inoperative position.

Depending from the parallel side bars of the yoke on each side of the car are threaded rods 17, the upper ends of which are bifurcated, as indicated at 18, for the reception of the adjacent bar of the yoke, there being a pin or bolt 19 extending through the bifurcatedend of the rod 17 and the yoke 8 and forming a pivotal connection between the same.

Slidably mounted on the rod 17 is a brakeshoe 20, preferably formed of soft Wood, although any other suitable material may be employed, if found desirable, said shoe being provided with a longitudinal bore21 for the reception of the rod 17 and having spaced vertical recesses 22 formed therein on each side of the bore 21 for the reception of a guiding-yoke 23. The yoke 23 is preferably formed of metal rod, an intermediate portion of which is threaded through the bifurcated portion of the rod 17, while its opposite ends are seated in the openings 22 and ment and also maintain said block in alinement with the car-wheels. The block 20 is disposed between the car-wheels and is provided with curved surfaces 24, adapted to bear against the tread-surface 0f the Wheels, as shown. Secured to the opposite sides of l the car between the wheels 6 is a bracket 25,

serve to guide the block in its vertical move- IOO provided with a laterally-extending lug 26, having a perforation formed therein for the reception of the free end of the rod 17, thereby to assist in guiding the rod when the brake-shoe is adjusted.

As a means for locking the brake-shoe in adjusted position the rod 17 is provided with a plurality of sets of clamping-nuts 27 and 28, which bear against the opposite ends of the brake-shoe, respectively, and serve to lock the brake shoe against longitudinal movement, there being a bearing-plate 29 secured to the upper end of the block 20 and disposed in contact with the clampingnuts 28, as shown.

Secured to the sides of the car near one end thereof are vertically-disposed bars 30, which contact with the side bars of the yoke 8 and serve to guide the latter in its upward movement, the lower end of the bars 30 being offset, as indicated at 31, thereby to cause the bars to assume a vertical position.

To apply the brakes, the operator grips the handle 13 and draws the lever 10 laterally until the lever clears the lug 16, after which said lever is moved in the direction of the arrow indicated in Fig. 2 of the drawings, and which causes the short arm 12 of said lever to move downwardly and consequently exert a corresponding pressure on the closed end of the yoke 8, thus forcing the brakeshoes in contact with the tread-surfaces of the wheel, said lever being locked in adjusted position by engagement with the teeth on the rack 15.

When the brake-shoe becomes worn or otherwise impaired from constant use, the latter may be adjusted vertically by releasing the clamping-nuts 27 and 28 and elevating the brake-shoe to the desired position, after which the clamping-nuts are adjusted on the rod 17 in engagement with the brakeshoe, as will be readily understood.

Should the pressure exerted by the brakeshoes on the car-wheels be excessive, they may be quickly adjusted vertically in the manner before described without the neces sity of removing the car to the barns to repair the defect.

From the foregoing description it is thought that the construction and operation of the device will be readily understood by those skilled in the art, and further description thereof is deemed unnecessary.

Having thus described the invention, what 1s claimed is- 1. The combination with a vehicle, of a yoke pivotally mounted on the vehicle, a rod depending from the yoke, a brakeshoe adjustable vertically of the rod, a guide member passing through the rod and loosely mounted in the brake-shoe, and means for locking the brake-shoe in adjusted position.

2. The combination with a vehicle, of a yoke pivotally mounted on the vehicle, a

vertically adjustable brake shoe pivotally mounted on the yoke and adapted to bear against the vehicle-wheels, a guiding mem ber carried by the yoke and loosely mounted in the brake-shoe, and means for locking the brake-shoe in adjusted position.

3. The combination with a vehicle, of a yoke pivotally mounted on the vehicle, a threaded rod pivotally associated with the yoke, a brake-shoe mounted for vertical movement on the rod and adapted to bear against the vehicle-wheel, and clampingnuts engaging the threads on the rod and bearing against the brake-shoe for locking the latter in adjusted position.

4. The combination with a vehicle, of a yoke pivotally mounted on the vehicle, a threaded rod depending from the yoke and having its upper end bifurcated for the reception of said yoke, a brake-shoe mounted for vertical movement on the rod, a guiding member threaded through the bifurcated end of the rod and loosely mounted in the brake-shoe, and clamping-nuts engaging the threads on the rod for locking the brakeshoe' in adjusted position.

5. The combination with a vehicle, of a yoke pivotally mounted on the vehicle, a threaded rod having its upper end bifurcated for the reception of the yoke and pivotally connected therewith, a brake-shoe mounted for vertical movement on the rod and provided with oppositely-disposed recesses, a guiding-rod passing through the bifurcated end of the threaded rod and having its opposite ends seated in the recesses in the brakeshoe, and clamping-nuts engaging the threads on the rod for locking the brake-shoe in ad justed position.

6. The combination with a vehicle, of a yoke pivotally mounted on the vehicle, a bracket secured to one side of the vehicle and having its lower end bent laterally and provided with an opening, a threaded rod having its lower end passing through said opening and its upper end bifurcated for the reception of the yoke and pivotally associated therewith, a brake-shoe mounted for vertical movement on the rod, a guiding-rod passing through the bifurcated end of the threaded rod and having its opposite ends seated in the recesses inthe brake-shoe, and clampingnuts engaging the threads on the rod for locking the brake-shoe in adjusted position.

7. The combination with a vehicle, of a yoke pivotally mounted on opposite sides of the vehicle and having its closed endeXtending transversely across the adjacent end of said vehicle, vertically-adjustable brakeshoes pivotally connected to the yoke and adapted to engage the vehicle-wheels,-a link depending from the closed end of the yoke, a bel1-crank lever pivotally mounted on one' end of the vehicle and having its short arm operatively connected with the IIO link and its long arm provided with an operating-handle, and a rock-shaft secured to the vehicle and adapted to engage the long end of the lever for locking the brake-shoes in operative position.

8. The combination With a vehicle, of a yoke pivotally mounted on opposite sides of the vehicle and having its closed end eX- tended transversely across the adjacent end of said vehicle, guides secured to the sides of the vehicle and bearing against the adjacent side bars of the yoke, threaded rods pivotally mounted on the opposite sides of the yoke, brake-shoes mounted for vertical movement on the rods, guiding members passing through the threaded rods and fitted in the brake-shoes, nuts threaded on the rods and hearing against the brake-shoes for locking the latter in adjusted position, and means operatively connected with the closed end of the yoke for simultaneously moving the brake-shoes to operative and inoperative position.-

In testimony that We claim the foregoing as our own We have hereto affixed our signa tures in the presence of tWo Witnesses.

DANIEL S. MILLER. JOHN M. LANDFAIR.

Witnesses A. S. BUTERBAUGH, J. A. HOUSTON. 

